Datasheet > AD7946_17

AD7946_17

更新时间： 2024-09-14 01:23:03

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
25页	597K
描述
PulSAR ADC in MSOP and LFCSP

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AD7946_17 数据手册

14-Bit, 500 kSPS,

PulSAR ADC in MSOP and LFCSP

Data Sheet

AD7946

FEATURES

TYPICAL APPLICATION CIRCUIT

0.5V TO 5V

14-bit resolution with no missing codes

Throughput: 500 kSPS

INL: 0.4 LSB typical, 1 LSB maximum ( 0.0061% of FSR)

SINAD: 85 dB at 20 kHz

THD: −100 dB at 20 kHz

Pseudo differential analog input range

0 V to REF with REF up to VDD

No pipeline delay

VIO

SDI

1.8V TO VDD

REF VDD

0V TO REF

IN+

IN–

SCK

SDO

CNV

AD7946

3- OR 4-WIRE INTERFACE

(SPI, DAISY CHAIN, CS)

GND

Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic

interface

Proprietary serial interface

Figure 1.

GENERAL DESCRIPTION

The AD7946¹is a 14-bit, charge redistribution, successive

approximation, analog-to-digital converter (ADC) that operates

from a single 5 V power supply, VDD. It contains a low power,

high speed, 14-bit sampling ADC with no missing codes, an

internal conversion clock, and a versatile serial interface port.

The part also contains a low noise, wide bandwidth, short

aperture delay track-and-hold circuit. On the CNV rising edge,

it samples an analog input IN+ between 0 V to REF with respect

to a ground sense IN−. The reference voltage, REF, is applied

externally and can be set up to the supply voltage.

SPI-/QSPI™-/MICROWIRE™-/DSP-compatible

Daisy-chain multiple ADCs and BUSY indicator

Power dissipation

3.3 mW at 5 V/100 kSPS

3.3 µW at 5 V/100 SPS

Standby current: 1 nA

10-lead MSOP (MSOP-8 size) and

3 mm × 3 mm LFCSP (SOT-23 size)

Pin-for-pin compatible with the 16-bit AD7686

APPLICATIONS

Its power scales linearly with throughput.

Battery-powered equipment

Data acquisition

Instrumentation

Medical instruments

Process control

The SPI-compatible serial interface also features the ability,

using the SDI input, to daisy-chain several ADCs on a single,

3-wire bus, or it provides an optional BUSY indicator. It is

compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate

supply VIO.

The AD7946 is housed in a 10-lead MSOP or a 10-lead LFCSP

with operation specified from −40°C to +85°C.

¹Protected by U.S. Patent 6,703,961.

Table 1. MSOP, LFCSP 14-/16-/18-Bit PulSAR® ADC

Type

14-Bit

16-Bit

100 kSPS

AD7940

AD7680

AD7683

AD7684

250 kSPS

AD7942¹

AD7685¹

AD7687¹

AD7694

400 kSPS to 500 kSPS

AD7946¹

≥1000 kSPS

ADC Driver

AD7686¹

AD7980¹

AD7983¹

ADA4941

ADA4841

AD7688¹

AD7693¹

18-Bit

AD7691¹

AD7690¹

AD7982¹

AD7984¹

ADA4941

ADA4841

¹Pin-for-pin compatible.

Rev. B

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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与AD7946_17相关器件

型号	品牌	获取价格	描述	数据表
AD79461	ADI	获取价格	14-Bit, 500 kSPS PulSAR ADC in MSOP
AD7946BCPRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BCPWP	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BCPZRL	ADI	获取价格	PulSAR ADC in MSOP and LFCSP
AD7946BCPZRL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, DSO10, 3 X 3 MM, ROHS COMPLIANT,
AD7946BCPZRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR® ADC in MSOP
AD7946BRM	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BRMRL7	ADI	获取价格	14-Bit, 500 kSPS PulSAR⑩ ADC in MSOP/QFN
AD7946BRM-RL7	ROCHESTER	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187-BA, MSOP-10
AD7946BRM-RL7	ADI	获取价格	1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO10, MO-187-BA, MSOP-10

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